Introduction to Waves

How are electromagnetic waves different than all other waves? They can be transmitted. They can be reflected. They can vibrate matter. They can travel through space.

They can travel through space.

Which statements best describe X-rays? Check all that apply. X-rays are electromagnetic waves. X-rays are longitudinal waves. X-rays are mechanical waves. X-rays are transverse waves. X-rays travel at the speed of light. X-rays travel at the speed of sound.

X-rays are electromagnetic waves. X-rays are transverse waves. X-rays travel at the speed of light.

Two waves are shown. Each wave has the same frequency and velocity. However, Wave B carries more energy. What part of the wave determines how much energy it has? amplitude period velocity wavelength

amplitude

A sound wave travels through water. What best describes the direction of the water particles? The water particles move perpendicular to the source of the sound wave. The water particles move in the same direction as the vibrating source of the sound wave. The water particles move in random patterns because the sound is diffracted in many directions. The water particles do not move because the sound wave does not have enough energy.

The water particles move in the same direction as the vibrating source of the sound wave.

A tuning fork is vibrating the air around it. What best describes the waves produced by the tuning fork? mechanical, because the air molecules are moving perpendicular to the tuning fork mechanical, because the vibrating tuning fork makes air molecules around it vibrate electromagnetic, because the air molecules are moving parallel to the tuning fork electromagnetic, because the vibrating tuning fork does not need air in order to produce sound

mechanical, because the vibrating tuning fork makes air molecules around it vibrate

A marching band is practicing. The band director sees the drum major hit a drum. How far away is the director if he hears the drumbeat in 0.40 seconds? The speed of sound is 330 m/s. 12 m 132 m 264 m 825 m

132 M

In an experiment, a ringing bell is placed in a vacuum jar that does not have any air in it. What best describes why the bell is seen vibrating but not heard? Light waves have high frequencies and are able to pass through the vacuum jar, but the frequencies of sound waves are too low to vibrate a vacuum. Light waves travel faster than sound waves, so they are able to travel through the vacuum jar, but sound waves do not have enough energy to vibrate glass. Light does not need a medium to travel through, but since sound waves must have a medium to vibrate, sound is not created where no air is present. Light is a longitudinal wave that is able to pass through the vacuum jar, but sound is a transverse wave that has to move perpendicular to air.

Light does not need a medium to travel through, but since sound waves must have a medium to vibrate, sound is not created where no air is present.

What best describes a possible transfer of energy? A mechanical wave transfers energy through matter. A longitudinal wave transfers energy perpendicular to wave motion. A transverse wave transfers energy parallel to wave motion. A sound wave does not need a medium to transfer energy through.

NOT A longitudinal wave transfers energy perpendicular to wave motion.

A student is performing an experiment comparing sound and light waves. The student gathers the following data. What conclusion does the student most likely make based on this data? Light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. All sound waves always have the same energy, so the temperature of the medium does not affect wave speed. Light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. Tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

NOT All sound waves always have the same energy, so the temperature of the medium does not affect wave speed.

A wave is produced in a Slinky as shown. What is the direction of the Slinky wire at Point P as the waves travel through this point?

NOT B

What is transmitted by all waves? energy mass matter sound

NOT matter

SONAR stands for "sound navigation and ranging," and it is used to map and explore the ocean floor. What best describes a SONAR wave? transverse and electromagnetic transverse and mechanical longitudinal and electromagnetic longitudinal and mechanical

NOT transverse and electromagnetic

Ten students stand in a circle and are told to make a transverse wave. What best describes the motion of the students? Each student bumps the shoulder of his or her neighbor. At the exact time, all students take a step to the right. The students skip clockwise, going in a circular motion. One at a time, each student lifts his or her hands up and then down.

One at a time, each student lifts his or her hands up and then down.

What type of wave is a microwave? heat longitudinal sound transverse

transverse

A pebble is dropped in a pond. Which best describes the type of wave seen here? transverse, because the water molecules move up and down, which is parallel to the motion of the wave transverse, because the water molecules move up and down, which is perpendicular to the motion of the wave longitudinal, because the water molecules move up and down, which is parallel to the motion of the wave longitudinal, because the water molecules move up and down, which is perpendicular to the motion of the wave

transverse, because the water molecules move up and down, which is perpendicular to the motion of the wave